<template>
    <div class="tags" v-if="showTags">
        <ul>
            <li class="tags-li" v-for="(item,index) in tagsList" :class="{'active': isActive(item.path)}" :key="index">
                <router-link :to="item.path" class="tags-li-title">{{item.title}}</router-link>
                <span class="tags-li-icon" @click="closeTags(index)">
                    <el-icon><Close /></el-icon>
                </span>
            </li>
        </ul>
        <div class="tags-close-box">
            <el-dropdown @command="handleTags">
                <el-button size="default" type="primary">
                    标签选项
                    <i class="el-icon-arrow-down el-icon--right"></i>
                </el-button>
                <template #dropdown>
                    <el-dropdown-menu>
                        <el-dropdown-item command="other">关闭其他</el-dropdown-item>
                        <el-dropdown-item command="all">关闭所有</el-dropdown-item>
                    </el-dropdown-menu>
                </template>
            </el-dropdown>
        </div>
    </div>
</template>

<script setup>
	import { Close } from '@element-plus/icons-vue'
	import { computed } from "vue";
	import { useStore } from "vuex";
	import { onBeforeRouteUpdate, useRoute, useRouter } from "vue-router";
	const route = useRoute();
	const router = useRouter();
	const isActive = (path) => {
		return path === route.fullPath;
	};

	const store = useStore();
	const tagsList = computed(() => store.state.tagsList);
	const showTags = computed(() => tagsList.value.length > 0);
	// console.log(tagsList.value.length,showTags.value,tagsList)
	// 关闭单个标签
	const closeTags = (index) => {
		const delItem = tagsList.value[index];
		store.commit("delTagsItem", { index });
		const item = tagsList.value[index] ? tagsList.value[index] : tagsList.value[index - 1];
		if (item) {
			delItem.path === route.fullPath && router.push(item.path);
		} else {
			router.push("index");
		}
	};

	// 设置标签
	const setTags = (route) => {
		const isExist = tagsList.value.some((item) => {
			return item.path === route.fullPath;
		});
		if (!isExist) {
			if (tagsList.value.length >= 8) {
				store.commit("delTagsItem", { index: 0 });
			}
			store.commit("setTagsItem", {
				name: route.name,
				title: route.meta.title,
				path: route.fullPath,
			});
		}
	};
	setTags(route);
	onBeforeRouteUpdate((to) => {
		setTags(to);
	});

	// 关闭全部标签
	const closeAll = () => {
		store.commit("clearTags");
		router.push("index");
	};
	// 关闭其他标签
	const closeOther = () => {
		const curItem = tagsList.value.filter((item) => {
			return item.path === route.fullPath;
		});
		store.commit("closeTagsOther", curItem);
	};
	const handleTags = (command) => {
		command === "other" ? closeOther() : closeAll();
	};

	// 关闭当前页面的标签页
	// store.commit("closeCurrentTag", {
	//     $router: router,
	//     $route: route
	// });
</script>


<style>
.tags {
    position: relative;
    height: 35px;
    overflow: hidden;
    background: #fff;
    padding-right: 120px;
    box-shadow: 0 5px 10px #ddd;
}

.tags ul {
    box-sizing: border-box;
    width: 100%;
    height: 100%;
}

.tags-li {
    float: left;
    margin: 3px 5px 2px 3px;
    border-radius: 3px;
    font-size: 12px;
    overflow: hidden;
    cursor: pointer;
    height: 23px;
    line-height: 23px;
    border: 1px solid #e9eaec;
    background: #fff;
    padding: 0 5px 0 12px;
    vertical-align: middle;
    color: #666;
    -webkit-transition: all 0.3s ease-in;
    -moz-transition: all 0.3s ease-in;
    transition: all 0.3s ease-in;
}

.tags-li:not(.active):hover {
    background: #f8f8f8;
}

.tags-li.active {
	background-color: #409eff;
    color: #fff;
}

.tags-li-title {
    float: left;
    max-width: 80px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    margin-right: 5px;
    color: #666;
}

.tags-li.active .tags-li-title {
    color: #fff;
}
.tags-li-icon{display: inline-block; width: 10px;height: 10px;margin-top: 2px;}
.tags-li-icon i{}
.tags-close-box {
    position: absolute;
    right: 0;
    top: 0;
    box-sizing: border-box;
    padding-top: 1px;
    text-align: center;
    width: 110px;
    height: 100%;
    background: #fff;
    box-shadow: -3px 0 15px 3px rgba(0, 0, 0, 0.1);
    z-index: 10;
}
</style>
